Question

( 8x - y ) (x +3y ) - (4x+ y)(9y - 2x)

Expand and simplify

Answer 1

Answer:

16x²-11xy-12y²

Step-by-step explanation:

(8x-y)(x+3y) - (4x+y)(9y-2x)

= (8x²+24xy-xy-3y²) - (36xy-8x²+9y²-2xy)

= 8x²+23xy-3y² - (34xy-8x²+9y²)

= 8x²+23xy-3y²-34xy+8x²-9y²

= (8x²+8x²)+(23xy-34xy)+(-3y²-9y²)

= 16x²-11xy-12y²